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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f2c97edf1ff2d9915c34b8448400c9134ce5a3221ad4b31581ca39adddc1de1e' 
  AND token = 'A6A5KZ/f9ghOhX5kawgutl0U2g6RDrneeR2jAHjEDsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}